1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___ALGORITHM_BINARY_SEARCH_H 10 #define _LIBCPP___ALGORITHM_BINARY_SEARCH_H 11 12 #include <__algorithm/comp.h> 13 #include <__algorithm/comp_ref_type.h> 14 #include <__algorithm/lower_bound.h> 15 #include <__config> 16 #include <__iterator/iterator_traits.h> 17 18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19 # pragma GCC system_header 20 #endif 21 22 _LIBCPP_BEGIN_NAMESPACE_STD 23 24 template <class _ForwardIterator, class _Tp, class _Compare> 25 _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 26 binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value, _Compare __comp) { 27 __first = std::lower_bound<_ForwardIterator, _Tp, __comp_ref_type<_Compare> >(__first, __last, __value, __comp); 28 return __first != __last && !__comp(__value, *__first); 29 } 30 31 template <class _ForwardIterator, class _Tp> 32 _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 33 binary_search(_ForwardIterator __first, _ForwardIterator __last, const _Tp& __value) { 34 return std::binary_search(__first, __last, __value, __less<>()); 35 } 36 37 _LIBCPP_END_NAMESPACE_STD 38 39 #endif // _LIBCPP___ALGORITHM_BINARY_SEARCH_H 40